I have a free account with 50MB storage space.  I uploaded two documents in the forum section for a total of 110kb.  On my dashboard it says

Disk space used 0%

Portal disk space 100MB

Used Disk space 110KB

What I am concerned about is how much space am I allotted for documents posted in the forums.  I also don't understand what is "portal disk space." Please explain how storage is counted.

Thanks-